Treddafydd Isaf is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 30 January 1968. Terraced house.
Treddafydd Isaf
- WRENN ID
- sacred-pier-autumn
- Grade
- II
- Local Planning Authority
- Isle of Anglesey
- Constituency
- Ynys Môn MP: Llinos Medi (PC)
- Country
- Wales
- Date first listed
- 30 January 1968
- Type
- Terraced house
- Address
- Treddafydd Isaf, Bethel, Bodorgan
- OS grid reference
- SH 388 716
- Coordinates
- 53.21749, -4.41546
- Source
- Cadw listing
Description
Treddafydd Isaf is a 2-storey, T-plan farmhouse dating from the 18th century, featuring an advanced wing at the front, offset to the left (south). A 1-storey back-kitchen has been added to create a cruciform layout. The building is constructed of rubble masonry with large boulder foundations and is finished with pebbledash rendering. It has a modern slate roof with rendered gable end stacks, and a substantial stack at the back-kitchen.
The principal elevation faces east and consists of a 2-storey, 3-window range with the wing to the left (south). The windows are arranged in a 1-2 pattern, and there is a wide doorway on the north range, positioned towards the angle with the wing. The windows are slightly recessed sashes with margin panes, and there is a top-hung casement window on the first floor of the advanced wing. The rear elevation features two small-pane sash windows on the first floor. The back-kitchen has modern windows and includes a lean-to structure against the west gable end.
Local climate
Treddafydd Isaf sits in one of the wettest parts of the UK, with an average of 1,180 mm of rain a year. This makes it wetter than 90% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 96% of listed buildings.
It experiences an average of 11 freeze-thaw cycles a year, fewer than 90% of listed buildings. Of these, 3 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
More on this building
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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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